FindX by RapidX: Find Anything! FindX is a tiny black Bluetooth tracker device that works with the easy to use FindX Tracker App. Together the device locator and app make it easy for you to keep track of everyday items – phone finder, wallet tracker, key finder and more. Spend less time searching for lost items and more time doing things you enjoy. FindX is also a convenient camera trigger. FindX is compatible with iOS and Android.